Что такое формат файла OTT?
Files with the .ott extension store text document templates saved in the OpenDocument standard. Internally, an .ott file is a ZIP archive containing a set of XML files - the same structure used by .odt documents, but identified as a template by a mimetype entry that reads application/vnd.oasis.opendocument.text-template.
Unlike regular documents, templates are designed as reusable starting points rather than finished files. They primarily define:
- Page layout,
- Default styles,
- Fonts,
- Formatting.
.ott stands for OpenDocument Text Template and applies specifically to text documents - spreadsheets and presentations use their own template formats (.ots and .otp respectively). Opening an .ott file in LibreOffice Writer or Apache OpenOffice creates a new, untitled .odt document based on it; to edit the template itself, you must open it explicitly through the application's template manager.
Templates can be created from existing documents using word processors that support the OASIS OpenDocument standard, such as LibreOffice Writer or Apache OpenOffice Writer. They are typically used to generate:
- Standardized business documents,
- Newsletters,
- Business notes,
- Official documents.
Many applications offer built-in template libraries, and numerous websites provide .ott templates for free download.
Безопасность и защита
РИСК: LOWOTT templates are ordinary ODF files and generally safe, with the same caveat as all office documents: they can carry macros (LibreOffice Basic) and templates are a natural place to hide auto-running code, which both LibreOffice and Word block or prompt about by default - never enable macros in a template you didn't expect. Embedded hyperlinks and OLE objects can point to malicious destinations. Opening an OTT with macros disabled is safe; as a ZIP, you can rename it to .zip and inspect the contents before trusting it.
Детали формата
в двух словахПОЛНОЕ НАЗВАНИЕOpenDocument Text Templateтакже известен как ODF text template, OpenDocument template
РАЗРАБОТЧИКOASIS (originated at Sun Microsystems / OpenOffice.org)с 2005 (ODF 1.0, OASIS); ISO/IEC 26300 since 2006; current major version ODF 1.3 (2021)
КАТЕГОРИЯТекстовые файлы
MIME-ТИПapplication/vnd.oasis.opendocument.text-template
ТИПZIP-based package of XML files (template variant of ODT)
СТАНДАРТОткрытый · без роялти
MAGIC BYTES · СИГНАТУРА ФАЙЛА
СМЕЩЕНИЕ
00010203
HEX
504B0304
ASCII
PK··
Like any ZIP; the first archive entry is an uncompressed file named "mimetype" containing "application/vnd.oasis.opendocument.text-template", so the MIME string is readable in plain bytes near offset 38 (this is what distinguishes an OTT from an ODT inside the ZIP).
Программы, открывающие файлы OTT
Windows4 apps
Microsoft Word
Платно File - Open the .ott (ODF supported since Word 2007). To make it a Word template, Save As .dotx. Complex ODF styling may shift slightly. 
LibreOffice Writer
Открытый код Double-click to start a new document from the template, or File - Templates - Manage Templates to edit the OTT itself. Native, full-fidelity. 
ONLYOFFICE Desktop Editors
Открытый код Free suite; opens the OTT, edits, and saves to ODT/DOCX or as a template.
Apache OpenOffice Writer
Открытый код Opens OTT natively (still ODF 1.2); sparsely maintained - LibreOffice is the actively developed choice. 
macOS2 apps
LibreOffice Writer
Открытый код Double-click to start a new document from the template, or File - Templates - Manage Templates to edit the OTT itself. Native, full-fidelity. 
Microsoft Word for Mac
Платно Opens OTT like the Windows version. (Apple Pages imports ODF with some formatting loss.) 
Linux2 apps
LibreOffice Writer
Открытый код Double-click to start a new document from the template, or File - Templates - Manage Templates to edit the OTT itself. Native, full-fidelity.
Collabora Office / ONLYOFFICE
Открытый код LibreOffice-based suites; open and edit OTT with desktop-grade fidelity. 
Android1 app
Collabora Office
Открытый код LibreOffice-based mobile app; opens OTT and creates documents from it.
iOS1 app
Collabora Office
Открытый код LibreOffice-based mobile app; opens OTT and creates documents from it.
Web1 app
Google Docs
Бесплатно Upload the .ott to Google Drive and open - it converts to a Docs document; download back as .odt or .docx. Технические подробности
глубокая спецификация| Container | ZIP archive (physically identical to a `.zip` file) |
| MIME type | `application/vnd.oasis.opendocument.text-template` |
| Magic bytes | `50 4B 03 04` (PK header at offset 0); uncompressed `mimetype` entry near offset 38 contains `application/vnd.oasis.opendocument.text-template`, distinguishing it from `.odt` |
| Internal XML encoding | UTF-8 (used in `content.xml`, `styles.xml`, `meta.xml`, `settings.xml`) |
| Compression | DEFLATE per entry; the leading `mimetype` file is stored uncompressed (ZIP STORED method) so it is readable without decompression |
| Encryption | Optional AES-256 password protection applied per stream; encryption metadata recorded in `META-INF/manifest.xml` |
| Typical file size | 8 KB - 2 MB; increases when images or embedded fonts are included |
| Internal structure | `mimetype`, `content.xml`, `styles.xml`, `meta.xml`, `settings.xml`, `META-INF/manifest.xml`, `Pictures/` - layout identical to `.odt` |
| Template vs. document distinction | The sole structural difference from `.odt` is the `mimetype` entry value; ODF version is recorded in the `office:version` attribute (e.g., `1.3`) in `content.xml` and `styles.xml` |
| Template open behaviour | Opening in LibreOffice Writer spawns a new untitled `.odt`; editing the template itself requires the explicit 'Edit Template' workflow or opening via the template manager |
| Integrity checking | ZIP CRC-32 checksum per entry; optional XML digital signatures stored in `META-INF/` |
| Flat-file equivalent | `.fodt` - a single uncompressed XML file serving the same template role without ZIP packaging |
| Standard body | OASIS Open Document Format TC; also published as ISO/IEC 26300 |
| Platform support | Windows, macOS, Linux, Android, iOS, and browser-based environments (Google Docs, ONLYOFFICE Online) |
| Выпущен | 2005 (ODF 1.0, OASIS); ISO/IEC 26300 since 2006; current major version ODF 1.3 (2021) |
| Последняя версия | ODF 1.3 (OASIS standard, 2021) |
| Открыть стандартное | Да · без роялти |
| Спецификация | www.oasis-open.org |
Конвертации OTT
Возможно
.OTT .PDFРУКОВОДСТВО
Да - откройте OTT в LibreOffice Writer и выберите «Файл» > «Экспорт в PDF»; это займет меньше минуты и…
Как конвертировать
.OTT .ODTРУКОВОДСТВО
Да, конвертировать OTT в ODT очень просто - откройте файл в LibreOffice Writer и используйте «Сохранить как»,…
Как конвертировать
.OTT .DOCXРУКОВОДСТВО
Да - откройте OTT в LibreOffice Writer и выберите Файл > Сохранить как > Документ Word (.docx); это займет…
Как конвертировать
.OTT .DOTXРУКОВОДСТВО
Да - откройте OTT в Microsoft Word и сохраните его как шаблон Word (.dotx).
Как конвертировать
.OTT .DOCРУКОВОДСТВО
Да, вы можете конвертировать OTT в DOC - откройте файл в LibreOffice Writer или Microsoft Word и выберите…
Как конвертировать
.OTT .DOTРУКОВОДСТВО
Да, вы можете конвертировать OTT в DOT с помощью LibreOffice Writer или Microsoft Word - откройте файл OTT,…
Как конвертировать
.OTT .HTMLРУКОВОДСТВО
Да - откройте OTT в LibreOffice Writer (бесплатно) и используйте «Файл» > «Сохранить как» > «Документ HTML».
Как конвертировать
Вопросы и ответы сообщества
спрошено пользователямиВопросов пока нет - станьте первым, кто спросит о файлах OTT.
Часто задаваемые вопросы
What is an OTT file?
It's an OpenDocument Text Template - a reusable layout/style starting point for word-processing documents in the open ODF standard. It's the template version of ODT, used mainly by LibreOffice Writer and OpenOffice.
How do I open an OTT file?
Open it in LibreOffice Writer (free), Microsoft Word (2007+), Google Docs (via upload), or ONLYOFFICE/Collabora. Double-clicking usually creates a new document FROM the template rather than editing the template itself.
What's the difference between OTT and ODT?
Same ODF format and file structure - the difference is role. An ODT is a document; an OTT is a template you create new documents from. The internal 'mimetype' marker is what distinguishes them.
How do I edit the OTT template itself instead of making a new document?
In LibreOffice, use File - Templates - Manage Templates and open the template for editing, or right-click the file and choose to open (not 'new from template'). Then Save As an .ott to keep it a template.
Can Microsoft Word open an OTT?
Yes - Word has supported ODF since Word 2007 (ODF 1.3 in Microsoft 365). Open the .ott directly; to keep it a Word template, Save As .dotx. Complex ODF styling may shift slightly.
How do I convert an OTT to a Word template (DOTX)?
Open the OTT in Word and choose Save As - Word Template (*.dotx). That gives you the Microsoft-ecosystem equivalent of the OpenDocument template.
Ссылки
1ISO/IEC 26300 - OpenDocument Formatwww.iso.org
2OASIS OpenDocument Technical Committee (ODF specifications)www.oasis-open.org
